This has a higher temperature threshold, and a small explosion, making it safe, but effective than the last one.
Comments
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I used your idea to make a safe fuse with RBDM. Where the cut-off temperature is controlled by the number of pixels of METL and PTCT. See ID: 2001217. Thanks for the idea.
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eventually I'll make a safer fuse without causing a fire. but, I can't seem to find anything that works just as good as the tnt cutting off the power.